Network Administrator (Senior)

CACI International•Ashburn, VA

7d•$103,800 - $218,100

About The Position

CACI is seeking a Senior Network Administrator for the Global Mission Operations Support (GMOS) contract, supporting the Department of State. The role supports a program of national importance by modernizing and maintaining applications and infrastructure through an integrated IT Service Management approach. The successful candidate will guide network operations and help deliver secure, reliable IT services. The position focuses on enterprise network administration and security, including firewalls, load balancers, API gateways, cabling, Layer 2/3 network devices, cloud and software-defined networking, and disaster recovery. It also involves coordinating with government teams and providers, supporting facility changes, analyzing network logs, and developing troubleshooting guidance for Service Desk Technicians.

Requirements

Bachelor's degree and 8 years of experience in related fields, such as network administration, network engineering, infrastructure administration, firewall management, or IT operations; equivalencies considered.
Active Secret clearance.
Proven experience with next-generation firewalls, including Palo Alto, F5 BIG-IP, and API Gateway, and advanced network security implementations.
Expertise in Layer 2/3 networking, fiber optic cabling, network infrastructure design, and disaster recovery configurations.
Strong knowledge of bandwidth management, capacity planning, and coordination with government network providers.
Leadership abilities and proven experience planning and leading technical network initiatives, serving as a subject matter expert, and supervising network operations teams.

Nice To Haves

Prior experience supporting federal agencies, especially the Department of State.
Experience with Cisco Umbrella, Illumio, AWS, Azure, or Oracle Cloud networking.
Professional certifications such as Cisco CCNP, Palo Alto Networks Certified Network Security Engineer (PCNSE), F5 Certified Administrator, or CompTIA Security+.
Knowledge of ITIL frameworks and change management processes, and experience supporting mission-critical network infrastructure in secure environments.

Responsibilities

Implement and manage web application firewalls and Next-Generation Firewalls, including Palo Alto, F5 BIG-IP ASM, and CA API Gateway.
Troubleshoot complex firewall issues with DT teams, facilitate secure connectivity with Government agencies, and liaise with DT's Firewall Advisory Board.
Install, configure, troubleshoot, and maintain internal wiring, fiber optic cabling, and Layer 2/3 network devices across enterprise infrastructure.
Install and configure load balancers and API Gateway appliances or virtual instances in data centers, cloud, or hybrid environments.
Track infrastructure component failures and initiate escalations to support timely responses within established SLA thresholds.
Coordinate with DT to plan and execute proactive bandwidth upgrades, using emerging technologies such as AI for network optimization and predictive analysis.
Reestablish network connectivity during office moves, relocations, and facility changes, and submit Technical Service Request documentation for new jacks and cabling installations.
Support CA micro-segmentation platforms and policies.
Support cloud and software-defined network infrastructure and policies.
Participate in design reviews for new facilities or renovations, providing technical input on network architecture, cabling infrastructure, and capacity requirements.
Support disaster recovery network configurations to ensure rapid failover, redundancy, and minimal downtime during contingency operations.
Develop and enhance technical or functional workarounds and triage steps to help Service Desk Technicians resolve network issues quickly.
Analyze network equipment logs to identify trends, detect problems, and maximize network performance and efficiency.